Feature: 1. This sound amplifier will offer you precise sound amplification. 2. Intelligent noise reduction, filtering out external noise. 3. Silicone earplugs, soft and elastic, comfortable to wear. 4. Simple operation, specially designed for the elderly. 5. Easy to carry and store anytime, anywhere. Specification: Features: This sound amplifier will offer you precise sound amplification. Intelligent noise reduction, filtering out external noise. Silicone earplugs, soft and elastic, comfortable to wear. Simple operation, specially designed for the elderly. Easy to carry and store anytime, anywhere. Adjustable volume, you can turn up the volume from low to high to meet your need. Specifications: Color: light yellow Max sound out put: 129+/- 3dB Sound gain: >= 40dB+/- 5dB Total harmonic wave distortion: <= 6% Frequency range: 350-4500MHz Input Noise: <=28 dB+/- 3dB Voltage: d.c.1.2V Current:<=1mA Charging time: about 2 hours Working time: about 40 hours Package size: 12*9*3.5cm Package weight: 95g Package List: 2 * Hearing Aid 8 * Earplugs 1 * Brush 1 * User Maual 1 * Charge dock 1 * USB Charging cable 1 * Portable bag Package List: 2 * Hearing Aid 8 * Earplugs 1 * Brush 1 * User Maual 1 * Charge dock 1 * USB Charging cable 1 * Portable bag